Biology

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Across
  1. 2. An organic molecule contains this element
  2. 3. An outer layer of cells for protection
  3. 4. A section of DNA that causes a trait
  4. 7. An organism that depends on others for food
  5. 10. A cell with membrane-bounded organelles
  6. 12. A chemical that provides toughness & flexibility
  7. 13. Vessels that carry blood away from heart
  8. 14. The soft tissue inside the bone the produces blood
  9. 15. An animal that does not have a backbone
Down
  1. 1. Process by which plants use energy of sun
  2. 5. Evaporation of water from plant leaves
  3. 6. Lacking internal body heat regulation
  4. 8. An organism that feeds on a living host
  5. 9. An animal that eats only plants
  6. 11. The end of an animal closest to the head